Not only________ vital for reducing fever and helping stop pain, but there are also other things that aspirin can help with.
I’m sorry I didn’t phone you,but I’ve been very busy ________ the past couple of weeks.
I always wanted to do the job which I’d been trained ________.
Nick,it’s good for you to read some books ________ China before you start your trip there.
Shirley,a real book lover,often brings home many books to read ________ the library.
He likes his new job,for he is paid ________ the day.